Several months later, Riker wanted to give Worf a surprise party for his birthday, but Deanna Troi talked him out of it. In a number of alternate quantum realities, however, the party did in fact take place. (TNG: "Parallels")

Keiko O'Brien prepared a surprise birthday party for her husband Miles in 2373, but during the party she actually was possessed by a pah-wraith. For the party she prepared q'parol, which was a big success. (DS9: "The Assignment")